I ordered from Osborn in the past and can't remember if the mirror like one I currently have mounted came from them which is incorrect. I think it's best
to find one at a swap meet and see it in person.

This one from YearOne looks close but it seems like no one uses an accurate image to depict the actual decal they’re selling. It might turn out to be too reflective. I’ve purchased from 3 different sources (not including YearOne) and the detail has been very poor.

If you have a picture....You can have any decal made pretty cheap these days. I had some custom Z 28 decals made for my flaps on the Air induction. If I remember it was like $ 10 plus shipping. High quality and still have not peeled or discolored.